“Throughout her career, Ms. Zadek was praised by critics for her dark-hued voice, dramatic intensity and fine musicality. Before retiring from the stage in 1971, she also sang at the Metropolitan Opera, Covent Garden and other major houses. But her primary work was in Vienna. There, in the city she feared would revile her [as a Jew], she sang more than 700 performances in dozens of roles; taught for years at the Vienna Music Academy; [and] presided over the International Hilde Zadek Voice Competition, a prestigious contest for young singers.” – The New York Times